Alert archive / South Dakota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 134, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 23, 1998, 2:33 AM CDT for Day County, Grant County, Roberts County, South Dakota. It was in force for 62 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 23, 1998, 2:33 AM CDT (07:33 UTC)
- Expired
- Aug 23, 1998, 3:35 AM CDT
- In force
- 62 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
Counties Day County, SD, Grant County, SD, Roberts County, SD
The radar
The Aberdeen radar (KABR), 102 km from the middle of the area, began a volume at 07:36 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 23, 2:50 AM CDT | Thunderstorm Wind 56 | Milbank, SD | Winds gusting to 65 mph in and around Milbank took the roof off a mobile home in southeast Milbank and wrapped it around a utility pole. The people inside the mobile home got out uninjured, but their belongings inside were rain soaked. The Summit Dairy Barn |
| Aug 23, 2:53 AM CDT | Thunderstorm Wind 61 | Roslyn, SD | Winds gusting to 70 mph downed many large branches in Roslyn. Power was also knocked out for a time in town. |
| Aug 23, 3:00 AM CDT | Thunderstorm Wind 52 | Wilmot, SD | Winds gusting to 60 mph brought several large branches down in Wilmot. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 7.6 hours before the alert went out and 115 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1593 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 1507 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 11:30 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 60 min |
| Aug 22, 11:54 PM CDT | Severe Thunderstorm Warning | ABR | Hughes, Lyman | 61 min |
| Aug 23, 1:36 AM CDT | Severe Thunderstorm Warning | ABR | Spink | 34 min |
| Aug 23, 2:33 AM CDT | Severe Thunderstorm Warning | ABR | Codington | 62 min |
| Aug 23, 2:54 AM CDT | Severe Thunderstorm Warning | ABR | Big Stone | 61 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1998Every severe thunderstorm warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.